Elegant mes Divi Plugin up to 4.27.6 on WordPress Contact Form Shortcode class-et-builder-element.php et_pb_contact_form redirect_url cross site scripting

Summaryinfo

A vulnerability classified as problematic was found in Elegant mes Divi Plugin up to 4.27.6. This affects the function et_pb_contact_form of the file class-et-builder-element.php of the component Contact Form Shortcode. Such manipulation of the argument redirect_url leads to cross site scripting. This vulnerability is listed as CVE-2026-3850. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Elegant mes Divi Plugin up to 4.27.6 and classified as problematic. Affected by this issue is the function et_pb_contact_form of the file class-et-builder-element.php of the component Contact Form Shortcode. The manipulation of the argument redirect_url with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

The Divi theme for WordPress is vulnerable to Stored Cross-Site Scripting via the `redirect_url` parameter of the `et_pb_contact_form` shortcode in all versions up to, and including, 4.27.6. This is due to the `redirect_url` attribute being sanitized with `esc_attr()` instead of `esc_url()` before being rendered into the `data-redirect_url` HTML data attribute. Additionally, `redirect_url` is absent from the hardcoded `$url_options` array in `class-et-builder-element.php`, so it does not receive `esc_url_raw()` sanitization during shortcode parsing. After a successful form submission, client-side JavaScript reads this data attribute and passes it directly to `window.location.href`, executing arbitrary JavaScript from a `javascript:` URI. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that execute whenever a user submits the contact form.

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-3850 since 03/09/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

By approaching the search of inurl:class-et-builder-element.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-69886). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• WordPress Plugin

Vendor

• Elegant mes

Name

• Divi Plugin

Version

• 4.27.0
• 4.27.1
• 4.27.2
• 4.27.3
• 4.27.4
• 4.27.5
• 4.27.6

CPE 2.3info

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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